article: Look! Here's a pencil box, it's orange, it's my pencil box, it's on the desk. Look! This is a pen, it's black. And this is an eraser, it's blue and white. They're both in the pencil box. This is a ruler, it's red, it's on the pencil box. That is a ruler, too. It's yellow. It's in the drawer. Where's my math book? Ah, it's there, under the sofa.
question: _  in the pencil box.
options: A pen is An eraser is A ruler and a pen are A pen and an eraser are